YN scattering data: AR62
The experiment:
The elastic scattering of Λ on protons is investigated.
Λ particles are produced in the interaction of 7-8 GeV/c
π- mesons with hydrogen and carbon in a propane
bubble chamber located in a constant magnetic field of 13700 Oe.
70000 photographs have been scanned; 20 events were selected.
The data:
Λ p → Λ p
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total elastic cross section (SGT)
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momentum range effective mean number of SGT [mb]
[MeV/c] momentum [MeV/c] events
400 - 1500 1000 ) 20 42 +/- 16
1500 - 2500 2000 ) 30 +/- 15
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Notes:
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Corrections have been made for small angle
Λ scattering ( < 18 degrees). These could not be detected.
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Some information on the angular distribution of the events is given
in a graph. PDG extracted numbers from these graphs. We do not include
these.
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PDG calculated (F-B)/(F+B) = -0.76 +/- 0.15 from the angular
distribution mentioned in the previous note.